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AJG: Arthur J. Gallagher & Co. and its subsidiaries provide insurance brokerage and risk management services to various commercial, industrial, institutional, and governmental organizations. It operates in two segments, Brokerage and Risk Management. The Brokerage segment primarily consists of retail and wholesale brokerage operations. Its retail brokerage operations negotiate and place property/casualty, employer-provided health and welfare insurance, and retirement solutions for middle-market commercial, industrial, public entity, religious, and not-for-profit entities. This segment's wholesale brokerage operations assist company's brokers, and other unaffiliated brokers and agents in the placement of specialized and hard to place insurance programs. It also acts as a brokerage wholesaler; and managing general agent or managing general underwriter distributing specialized insurance coverages for insurance carriers. The Risk Management segment provides contract claim settlement and administration services for enterprises that choose to self-insure some or all of their property/casualty coverages and for insurance companies that choose to outsource some or all of their property/casualty claims departments. This segment also offers integrated disability management programs, information services, risk control consulting (loss control) services, and appraisal services. The company provides its services through a network of insurance brokers and consultants. It also owns a biomass emissions pipeline that removes and sells gas emissions from landfills; commercializes multi-pollutant reduction technologies that remove mercury, sulfur dioxide, and other toxic emissions created by coal-fired power plants; and owns technologies that reduce carbon dioxide emissions created by burning fossil fuels. The company operates in the United States, Australia, Bermuda, Canada, and the United Kingdom. Arthur J. Gallagher & Co. was founded in 1927 and is headquartered in Itasca, Illinois.

MMC: Marsh & McLennan Companies, Inc., a professional services company, provides advice and solutions in the areas of risk, strategy, and human capital. It operates in two segments: Risk and Insurance Services, and Consulting. The Risk and Insurance Services segment provides risk management and insurance broking, reinsurance broking, and insurance program management services to businesses, public entities, insurance companies, associations, professional services organizations, and private clients. The Consulting segment provides advice and services to the managements of organizations in the area of human resource consulting comprising retirement and investments, health and benefits, and outsourcing and talent; and offers strategy and risk management consulting services, including management, economic, and brand consulting. The company also offers investment consulting services for endowments and foundations in the United States; provides health and benefit recordkeeping, and employee enrollment technology; and offers human resource knowledge, data, and solutions for professionals in various industries. It principally serves customers in the United States, the United Kingdom, the Asia Pacific, and Continental Europe. The company was founded in 1871 and is headquartered in New York, New York.

WSH: Willis Group Holdings Public Limited Company and its subsidiaries provide a range of insurance and reinsurance broking, and risk management consulting services to clients in various industries, including aerospace, marine, construction, and energy. It operates as an intermediary between its clients and insurance carriers by advising its clients on their risk management requirements, helping clients determine the means of managing risk, and negotiating and placing insurance risk with insurance carriers through its global distribution network. The company also assists clients in the assessment of their risks, advises on the ways of transferring suitable risk to the global insurance and reinsurance markets, and then executes transactions at the appropriate available price, terms, and conditions for its clients. In addition, it offers clients a broad range of services to help them to identify and control their risks. These services include strategic risk consulting, including providing actuarial analyses; various due diligence services; practical on-site risk control services, such as health and safety or property loss control consulting; and analytical and advisory services comprising hazard modeling and reinsurance optimization studies. Further, the company assists clients in planning how to manage incidents or crises when they occur by providing services, such as contingency planning, security audits, and product tampering plans. It serves clients located in approximately 190 countries, including multinational and middle-market companies operating in various industries, as well as public institutions and individual clients. The company was formerly known as Willis Group Holdings Limited and changed its name to Willis Group Holdings Public Limited Company in January 2010. Willis Group Holdings Public Limited Company was founded in 1828 and is headquartered in London, the United Kingdom.